Construction machine having location-based project data files

ABSTRACT

A construction machine for automatically receiving selected project data files based on the geographical location and identification of the machine. The machine includes an auto-start transceiver for transmitting the local location and identification of the machine and receiving project data files from a project data distributor that are selected for the local location and identification for operation of the machine.

CROSS REFERENCE TO RELATED APPLICATION

This application is a continuation of application Ser. No. 11/047,108 filed Jan. 31, 2005 now U.S. Pat. No. 7,245,999 by the same inventors for the same assignee.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The invention relates generally to construction machines and more particularly to a construction machine having automatic startup based on its geographical location.

2. Description of the Background Art

The use of digital project data files and precise machine positioning is becoming more common for construction project applications such as mining, roads, land fill, site preparation and building. The project data files generally include digital terrain models. The digital terrain models have geographical and elevation coordinates for current and planned design surfaces. The workers at project sites use the terrain models with precise local positions for operating construction machines such as excavators, stakers, bulldozers, post hole diggers, and the like. The worker arrives at the site, unloads the machine and begins determining positions. However, before he can begin work he needs to be given the project data files that are pertinent for his project and machine.

The project data files are generally stored and maintained in a project database somewhere other than the project site. There may be project data files for tens of different projects and hundreds of machines in a central database at a headquarters office. These files may be carried to the site in a hardware form such as a compact disc or downloaded using a radio system or telephone connection from the database to each machine. However, there is the non-trivial task of sorting out the digital terrain models that are pertinent to a particular project for a particular machine from the hundreds of others. The task is made more difficult for projects covering a large area because the size of the data files becomes unwieldy and geographical calibrations may be different for different locations within the project. Existing systems accomplish the selection task with the use of project and work order numbers. Unfortunately, the use of project and workorders numbers can be subject to daily human error and, in any case, become difficult to implement when the machines move their location across geographical boundary lines within the project site that may not be visible to the operator.

There is a need for a construction project data delivery apparatus that automatically selects and delivers the project data files that are pertinent for a construction machine at a project site. There is a further need for a construction project data delivery apparatus that automatically delivers new project data as the machine moves within the site.

SUMMARY OF THE INVENTION

The present invention is a construction machine that automatically receives selected project data files based on a location and identification. The project data files may include geographical coordinate calibrations, communication system directions, work orders, design and current digital terrain models, background files, and application programs. A project data distributor stores and maintains the project data files in association with project site locations and project plan machine identifications. In some cases the project site locations are segmented into location pages.

The construction machine includes an auto-start mechanism for determining and transmitting a geographical location and an identification to the project data distributor. The project data distributor uses the machine location and identification for searching a project database of project data files and selects only those project data files for the project site location and project plan machine identification matching the remote machine location and the remote machine identification. The selected project data files are then transmitted to the machine. As the machine moves within the project site, it continues to transmit its remote location. When the remote location moves to a new location page in the database, the project data distributor automatically selects and transmits the project data files for the new location page to the machine.

In one embodiment, the present invention is a construction machine having a location device for determining a local location and an auto-start transceiver for transmitting a machine signal having the local location and receiving a distribution signal from a project data distributor having project data files selected according to the local location for operation of the machine. In a variation or an extension of this embodiment, the machine signal is transmitted automatically at power-up of the machine. In another variation or extension of this embodiment, the machine signal includes information for an identification of the machine, and the project data files are selected according to the identification.

In another embodiment, the present invention is a method for use in a construction machine, comprising steps of determining a local location; transmitting a machine signal having the local location; and receiving a distribution signal from a project data distributor having project data files selected according to the local location for operation of the machine. In a variation of an extension of this embodiment, the machine signal is transmitted automatically at power-up of the machine. In another variation or extension of this embodiment, the machine signal includes information for an identification of the machine, and receives the project data files selected according to the identification.

In another embodiment, the present invention is a tangible medium containing a set of instructions for causing a processor to control a machine for carrying out the steps of determining a local location; transmitting a machine signal having the local location; and receiving a distribution signal from a project data distributor having project data files selected according to the local location for operation of the machine. In a variation or an extension of this embodiment, the tangible medium instructs the processor so that the machine signal is transmitted automatically at power-up of the machine. In another variation or extension of this embodiment, the tangible medium instructs the processor to transmit the machine signal with information for an identification of the machine, and to receive the distribution signal with project data files that are selected according to the identification.

An advantage of the construction machine of the present invention is that the selected project date files that are pertinent for a particular construction machine are automatically received by the machine so that the machine or machine operator does not need to sort through unneeded files. Another advantage is that the selected project data files are automatically selected according to the location and identification of the machine so that work and project numbers do not need to be used in order to deliver the pertinent project data files. Another advantage is that updated project data files may be received automatically as the machine moves location within a project site.

These and other embodiments and advantages of the present invention will no doubt become obvious to those of ordinary skill in the art after having read the following detailed description of the best mode for carrying out the invention and viewing the various drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a block diagram of a construction project data delivery apparatus of the present invention;

FIG. 2 is a block diagram of project data files for the project data delivery apparatus of FIG. 1;

FIG. 3 is a chart for the project data files of FIG. 2;

FIG. 4 is a chart showing elevation ranges for the project data files of FIGS. 2 and 3;

FIG. 5 is a chart showing time ranges for the project data files of FIGS. 2 and 3;

FIG. 6 is a flow chart for a method of the present invention for distributing project data files;

FIGS. 7A, 7B and 7C are flow charts for organizing project data files, receiving a machine signal and selecting project data files for the method of FIG. 6; and

FIG. 8 is a flow chart of a method of the present invention for receiving project data files.

BEST MODE FOR CARRYING OUT THE INVENTION

The details of the preferred embodiments for carrying out the idea of the invention will now be described. It should be understood that the description of these details is not intended to limit the invention to these details. On the contrary these details are merely intended to describe the best mode known to the inventors for carrying out the idea of the invention. Numerous alternatives, modifications and equivalents of the embodiments described herein will be apparent to someone skilled in the art as within the scope of the idea of this invention.

FIG. 1 illustrates a construction project data delivery apparatus of the present invention referred to with a reference number 10 for distributing location-selected project data files 12. The apparatus 10 includes a project data distributor 14 and at least one construction machine 16. The project data distributor 14 may be considered a specialized server for construction projects. Tens or hundreds of construction machines 16 may be used with the apparatus 10. The project data distributor 14 may reside at a single base station location or may have component parts in several different geographical locations that are in communication with each other.

Whether the data distributor 14 is located at a single location or separated into component parts in widely scattered locations, it effectively includes a project control database 22 of project data files 24 for construction projects, a search program 26 for finding the selected project data files 12, a distribution receiver 28 for receiving signals 32 from the construction machines 16, and a distribution transmitter 34 for transmitting distribution signals 36 having the selected data project files 12 to the construction machines 16. The project data files 24 are stored and maintained in the database 22 in association with project site locations 38 for the geographical area or the construction project, location pages 39 for smaller geographical areas within the area the project site location 38, and construction project plan machine identifications 40.

The term “construction” is defined to include construction for buildings and pipelines, stakeout, grading, land fill, mining, road building, trenching, excavating, and the like where real property is being transformed by machinery. The construction machine 16 is defined as a machine used for construction. Examples of construction machines 16 are graders, bulldozers, surveyors, excavators, post hole diggers, cranes, trenchers, stakers, and the like. The construction machine 16 can also be a supervisor's management tool insofar as it is used for the construction project at the project site. For example the tool can be a computing device such as a laptop, personal digital assistant (PDA), cellphone with PDA capability, or the like.

The construction machine 16 includes a location device 44 for providing a remote machine location 45 for start up and a precise position 46 for operation, an auto-locate-start mechanism 48, an identification 50, a transceiver 52, a processor 54, a display 56, and may include a construction implement 58. The identification 50 is stored in a way to be readable by the auto-start mechanism 48. The auto-start mechanism 48 and transceiver 52 may be considered as an auto-start transceiver 60. At power turn-on or return from a standby mode or with a key stroke, the auto-start mechanism 48 performs an auto-start to instruct the location device 44 to compute the location 45 and instruct the transceiver 52 to transmit the location 45 and the identification 50 in the signal 32. The search program 26 uses the location 45 and identification 50 for searching the project data files 24 in the database 22 for finding the particular set of selected project data files 12 where the project site location 38 encompasses the remote machine location 45 and the project plan machine identification 40 matches the remote machine identification 50.

The distribution transmitter 34 transmits the location-selected project data files 12 in the distribution signal 36 to the machine transceiver 52. The auto location-start mechanism 48 instructs the transceiver 52 to receive the selected project data files 12 in the distribution signal 36 and pass the data to the processor 54. The processor 54 processes the selected project data files 12 into a form where they can be used directly by the construction implement 58 for operation or used by being displayed on the display 56 in a manner so that a human worker can operate the construction machine 16.

The invention is not dependent on the method by which the signals 32 and 36 are communicated. The signals 32 and 36 are preferably wireless signals, such as radio, cellular telephone, satellite, optical and the like, when they are transmitted and received by the machine transceiver 52. However, the signals 32 or 36 may be transmitted and received by the machine 16 using landline telephones. The signals 32 and 36 may be converted between landline and wireless signals using either fulltime lines or packets any number of times between the distribution receiver and transmitter 28 and 34 and the transceiver 52.

The location device 44 may use two different instruments and/or use two different methods for first quickly determining the location 45 for automatic project data delivery, and then precisely determining the location or position 46 for operation of the machine 16 according to the project data. The location 45 is used for automatically selecting which of the many sets of project data files 24 that are stored in the database 22 are selected and delivered to the construction machine 16. With the use of this location 45, the operator of the construction machine 16 automatically and seamlessly receives only the information that he needs for his work without having to sort through unneeded files.

The location 46 is used with the selected project data files 12 for directing or informing the operator of the machine 16 for operating the machine 16 directly. For example, the selected project data files 12 may guide the operator to raise or lower the level of the blade or shovel of the implement 58 to the design surface carried in a digital terrain model in the selected project data files 12. It should be noted that the position accuracy of the location 45 for finding the selected project data files 12 may be several meters or even tens of meters whereas the location 46 may require centimeter accuracy for directing the implement 58. Typically, the precise location 46 is determined with the aid of reference location information obtained by receiving a radio signal for calibrating the raw location information measured at the machine 16.

A GPS receiver may be used for the location device 44 for providing the location 45 and a real time kinematic (RTK) GPS receiver may be used for providing the location 46. An exemplary RTK GPS system is described by in U.S. Pat. No. 5,519,620, incorporated herein by reference, entitled “centimeter accurate global positioning system receiver for on-the-fly real-time-kinematic measurement and control” by Nicholas C. Talbot et al. However, the apparatus 10 is not dependent on the device or manner in which the information for the locations 45 and 46 are determined. A user may enter a location that is different than the actual location of the machine 16 and the entered location may be used as the location 45.

Several examples of systems for determining location will now be referenced. Location may be determined by ranging or timing with global navigation satellite system (GNSS) signals such as GPS signals, global orbiting navigational satellite system (GLONASS) signals, Galileo signals and the like. The GNSS signals are normally broadcast by satellites but may be broadcast by pseudolites. Location is preferably in the form of geographical coordinates such as latitude, longitude and altitude along with time. However, location may also be in the form of pseudoranges that are processed in the project data distributor 14 in order to provide the geographical coordinates for the location.

Location can also be determined with terrestrial positioning systems. One example of such terrestrial positioning system is the system proposed by Kelley et al. in U.S. Pat. No. 5,173,710 entitled “navigation and positioning system and method using uncoordinated beacon signals” incorporated herein by reference. Another example is the hybrid radio location system using both radio and GPS pseudoranges that is described by Loomis in U.S. Pat. No. 6,430,416 incorporated herein by reference.

Another example is the system described by Matthew Rabinowitz and James Spilker in U.S. application Ser. No. 10/159,478 filed May 31, 2002 and assigned to Rosum Corporation of Redwood City, Calif., entitled “position location using global positioning system signals augmented by broadcast television signals” which is incorporated herein by reference. This applications shows methods and apparatus' using broadcast television signals in conjunction with GPS signals to determine the position of a user.

Another example is the system described by Matthew Rabinowitz and James Spilker in U.S. application Ser. No. 10/054,302 filed Jan. 22, 2002 and assigned to Rosum Corporation of Redwood City, Calif., entitled “position location using broadcast analog television signals” which is incorporated herein by reference. This applications shows methods and apparatus' using a plurality of analog television transmitters at known reference points to determine the position of a user.

Another example is the system described by Matthew Rabinowitz and James Spilker in U.S. application Ser. No. 09/932,010 filed Aug. 17, 2001 and assigned to Rosum Corporation of Redwood City, Calif., entitled “position location using terrestrial digital video broadcast television signals” which is incorporated herein by reference. Another example is the system described by Matthew Rabinowitz and James Spilker in U.S. application Ser. No. 10/054,262 filed Jan. 22, 2002 and assigned to Rosum Corporation of Redwood City, Calif., entitled “time-gated delay lock loop tracking of digital television signals” which is incorporated herein by reference. These two applications show methods and apparatus' using a plurality of digital television transmitters at known reference points to determine the location of a user.

Other examples location determination systems that may be used for determining location are radio navigation systems (RNS) using either triangulation or timing, position augmentation services (PAS) using local location signals transmitted from local reference points to augment RNS and/or GNSS signals, and the like. One such system known commercially as a Terralite™ XPS system made by Novariant, Inc. of Menlo Park, Calif., uses self-surveying XPS stations for augmenting the GPS system.

The project data distributor 14 also includes a geographical pager 62, an elevation selector 64, a time selector 66 and a model update program 68. The geographical pager 62, the elevation selector 64 and the time selector 66 operate with the search program 26 for further selecting the selected project data files 12 for the location page 39, elevation and time, respectively, that are designated by the remote location 45. It should be understood that time can be included with the location 45.

After auto-start, under control of the operator of the machine 16 or automatically when the location 45 changes or with some other automatic basis, the construction machine 16 continues to transmit new positions for its remote location 45 and identification 50 in the signal 32 to the project data distributor 14. As the machine 16 moves across boundaries at the construction site that may be invisible, the geographical pager 62 operates with the search program 26 for paging through the selected project data files 12 for selecting the files 12 that are associated with the location page 39 that encompasses the new positions of the remote location 45. Similarly, the elevation selector 64 operates with the search program 26 for selecting the location-selected project data files 12 that are associated with elevation ranges that encompasses the new position of the remote location 45. The time selector 66 operates with the search program 26 for selecting the location-selected project data files 12 that are associated with time ranges that encompasses the time of the remote location 45. The model update program 68 uses the remote location 45 and identification 50 for updating the selected project data files 12 for current information, such as a current surface, at the construction site.

FIG. 2 represents the way in which the project data files 24 are organized. The project data files 24 are stored in association with project site locations 38. A first of the project site locations 38 is shown as project site location 1. The project data files 24 may be further associated with location pages 39 having areas within the project site locations 38. A first of the location pages 39 within the project site location 1 is shown as page 1. The project data files 24 are further associated with project plan machine identifications 40. The project plan machine identifications 40 are shown as A, B, C, D and E. The search program 26 searches the project data files 24 according to the remote location 45 for the project site location 38 and page 39, and according to the remote machine identification 50 for the project plan machine identification 40 into order to select the selected project data files 12 that are transmitted to the remote machine 16.

The project data files 24 on the database 22, organized as described herein, may be contained on a tangible medium 80 in a form that may be read by the search program 26 and written to by the model update program 68. The medium may be a digital memory device such as a digital video device (DVD), compact disk (CD), electronic memory chips, a hard disk, or the like. The search program 26 and the other elements of the project data distributor 14 are controlled by one or more digital processors 82 (FIG. 1).

FIG. 3 represents the database 22 of the present invention. The database 22 comprises data for individual projects shown as projects 1, 2 through n. The project data files 24 for the projects 1, 2 through n have the associated project site locations 38. The project site locations 38 are illustrated with numbers 1, 2 through n corresponding respectively to the projects. The data in the project site locations 1, 2 through n define the geographical boundaries enclosing the area of the site. Each of the project site locations 1, 2 through n may be subdivided into, possibly overlapping, pages 39 illustrated as pages 1, 2 through n where the location page 39 has a geographical area within the area of the project site location 38.

The project site locations 1, 2 through n and the location pages 1, 2 through n have one or more project plan machine identifications 40, designated A through Y, for the construction machines 16 that are scheduled for the projects. For the page 1 of the project site location 1, the project plan machine identifications 40 are designated A (grader), B (bulldozer), C (supervisor laptop), D (surveyor) through E (post hole digger). The identifications A through Y represent exemplary project plan machine identifications 40 for page 1 of the project site location 1 through to page n of the project site location n. It should be noted that the database 22 is not limited to A through Y identifications but can be a much larger number if desired.

Moreover, each of the project plan machine identifications A through Y may be repeated and associated in the database 22 with the project data files 12 for several different project site locations 1, 2 through n. For example, the project plan identification designated as A (grader) may have project data files 12 associated with any or all of the project site locations 1, 2 through n. For this example, when the grader A is located at a project site location 2, page 1, it would receive the selected project data files 12 for the identification A (grader) and location 2, page 1. Using the nomenclature of the figure, the selected project data files 12 would have comm 21A, task 21A, applet 21A, geo cal 21, design DTM 21, current DTM 21 and background files 21.

The project data files 24 include files for communication system (comm system), work order, application program (app program), geographic calibration and design control. The design control files include a design surface digital terrain model (DTM), a current surface digital terrain model (DTM), and background files having general information. The design and current DTMs have precise geographical coordinates.

The design DTM represents the surface that is required according to the construction plan. The current DTM represents a surface as it exists or existed that may be updated from the construction machine 16 to the database 22. For example, a grader may have graded an area at the project site to a level that is part way between an original current surface and the required design surface. When the machine 16 arrives on site it typically needs both the design and current DTMs.

Digital terrain models have the essential data for defining a surface in three dimensions. There are several digital terrain model formats such as a grid model, an irregular triangular network model, and an element based model. A grid model has equally spaced horizontal points showing elevations. For example, the model may contain the elevations for a one meter by one meter grid. An irregular triangular network has a sparse grid of horizontal points with elevations and irregular triangles for defining the surfaces between the points. The irregular triangular network model is commonly used by surveyors. An element based system has connected horizontal straights and curved elements with vertical elements and vertical cross-sections. The element based model may be most efficient for road building.

The project data files 24 for the communication system, work order and application program are represented as being individual files for respective project plan machine identifications A through Y for respective project site locations 1 through n and respective location pages 1 through n. The project data files 24 for geographical calibration and design control are represented as common master files for the project plan machine identifications A through Y for respective locations 1 through n and respective pages 1 through n. However, any of the files may be stored individually or as master files for each of the identifications A through Y or each type of machine (grader, bulldozer, supervisor laptop, surveyor, and the like) for the identifications A through Y or the location pages 1 through n within a particular project site 1 through n.

At auto-start, the machine 16 needs to be able to transmit the machine signals 32 having the location 45 and identification 50 and the project data distributor 14 needs to be able to receive the signals 32 in order to search the database 22 for selecting the project data files 12. This or further communication with the signals 32 and 36 and the machine 16 may be specified by the communication system information in the selected files 12.

The communication system specifies the equipment, channels, coding, routing and the like for the machine signals 32 and the distribution signals 36 for communication between the project data distributor 14 and the individual construction machines 16. For example, the comm 11A specifies the communication system for the project plan machine identification A (grader) when the machine corresponding to A (grader) is at location 1, page 1. The comm 12F specifies the communication system for the project plan machine identification F (grader) when the machine corresponding to F (grader) is at location 1, page 2. The comm in K specifies the communication system for the project plan machine identification K (grader) when the machine corresponding to K (grader) is at location 1, page n. The comm 21P specifies the communication system for the project plan machine identification P (grader) when the machine corresponding to P (grader) is at location 2, page 1. The comm n1U specifies the communication system for the project plan machine identification U (grader) when the machine corresponding to U (grader) is at location n, page 1. The communication systems are similarly specified for the project plan machine identifications A-Y when the corresponding machines 16 are at their respective locations 1 through n and location pages 1 through n.

The work order specifies the tasks that are to be performed by the individual remote machines A through Y. For example, the task 11A specifies the task that is to be performed by the machine 16 corresponding to the project plan machine identification A (grader) when the machine 16 is at location 1, page 1. The task 12F specifies the task that is to be performed by the machine 16 corresponding to the project plan machine identification F (grader) when the machine 16 is at location 1, page 2. The task 1 nK specifies the task that is to be performed by the machine 16 corresponding to the project plan machine identification K (grader) when the machine 16 is at location 1, page n. The task 21P specifies the task that is to be performed by the machine 16 corresponding to the project plan machine identification P (grader) when the machine 16 is at location 2, page 1. The task n1U specifies the task that is to be performed by the machine 16 corresponding to the project plan machine identification U (grader) when the machine 16 is at location n, page 1. The tasks are similarly specified for the project plan machine identifications A-Y when the corresponding machines 16 are at their respective locations 1 through n and location pages 1 through n.

The geographic calibrations calibrate the coordinates of the precise location 46 determined by the location device 44 to a local coordinate system used for the project. For example, the location device 44 may include a precise positioning global positioning system (GPS) receiver for determining the location 46 in terms of real time kinematic (RTK) coordinates with respect to an RTK reference and a WGS84 datum model. The local position coordinates for the project will in general be referenced to some other mark. The geographical calibration calibrates the precise location 46 to the local coordinates in order to use the digital terrain models for its work. The geographic calibration 11 calibrates the machines 16 corresponding to the project plan machine identifications A-E for the page 1 of the location 1. The geographic calibration 12 calibrates the machines 16 corresponding to the project plan machine identifications F-J for the page 2 of the location 1. The geographic calibration in calibrates the machines 16 corresponding to the project plan machine identifications K-0 for the page n of the location 1. The geographic calibration 21 calibrates the machines 16 corresponding to the project plan machine identification P-T for the page 1 of the location 2. The geographic calibration n1 calibrates the machines 16 corresponding to the project plan machine identification U-Y for the page 1 of the location n.

The design control files are categorized as design digital terrain models (DTM)s, current digital terrain models (DTM)s, and background files. The design control files are stored in association with the pages 1 through n of the project site location 1 through n. For example, the design DTM 11, current DTM 11 and background files 11 represent design control files 11 associated with project plan machine identifications A-E at location 1, page 1. The design DTM 12, current DTM 12 and background files 12 represent design control files 12 associated with project plan machine identifications F-J at location 1, page 2. The design DTM in, current DTM in and background files in represent the design control files 12 associated with project plan machine identifications K-O at location 1, page n. The design DTM 21, current DTM 21 and background files 21 represent design control files 21 associated with project plan machine identifications P-T at location 2, page 1. The design DTM in, current DTM 1 n and background files in represent design control files in associated with project plan machine identifications U-Y at location n, page 1.

The background files may include reference line work, a picture, progress lines or avoidance zones. The reference line work may be a property boundary or an intersecting existing roadway. The picture may be an aerial photograph of the project site. The progress lines may be lines defining a previous level of work. The avoidance zone may be an ecologically sensitive or hazardous area.

The application program provide applets A through Y to the individual construction machines 16 for using the project data files 12. The applets may be used in order to interpret, run or display the information for the communication system, the work order, the geographical calibration and/or the project control files. For example, the applet 11A is the applet that enables the machine 16 corresponding to the project plan machine identification A (grader) to use the task 11A, comm 11A, calibration 11 and/or design control files 11. The applet 12F is the applet that enables the machine 16 corresponding to the project plan machine identification F (grader) to use the task 12F, comm 12F, calibration 12 and/or design control files 12. The applet 1 nK is the applet that enables the machine 16 corresponding to the project plan machine identification K (grader) when the machine K (grader) to use the task 1 nK, comm 1 nK, calibration in and/or design control files in. The applet 21P is the applet that enables the machine 16 corresponding to the project plan machine identification P (grader) to use the task 21P, comm 21P, calibration 21 and/or design control files 21. The applet n1U is the applet that enables the machine 16 corresponding to the project plan machine identification U (grader) to use the task n1U, comm n1U, calibration n1 and/or design control files n1. The applets are similarly specified for machines 16 corresponding to the project plan machine identifications A-Y when they are at their respective locations 1 through n and location pages 1 through n.

FIG. 4 illustrates a preferred embodiment of the database 22 where the project data files 24 are represented as being stored in association with elevations. For example, task 11B-e1, design DTM 1B-e1, current DTM 1B-e1 and background files 11-e 1 are stored in association with location 1, page 1, project plan machine identification B (bulldozer) and elevation 1. Task 11B-e2, design DTM 11B-e2, current DTM 11B-e2 and background files 11-e 2 are stored in association with location 1, page 1, project plan machine identification B (bulldozer) and elevation 2. Task 11B-e3, design DTM 11B-e3, current DTM 11B-e3 and background files 11-e 3 are stored in association with location 1, page 1, project plan machine identification B (bulldozer) and elevation 3. Task 11B-e4, design DTM 11B-e4, current DTM 11B-e4 and background files 11-e 4 are stored in association with location 1, page 1, project plan machine identification B (bulldozer) and elevation 4. There may be more any number of elevations. Similar associations may be made for other locations 1 through n, pages 1 through n, project plan machine identifications A through Y.

FIG. 5 illustrates a preferred embodiment of the database 22 where the project data files 24 are represented as being stored in association with times. For example, task 11B-t1, design DTM 11B-t1, current DTM 11B-t1 and background files 11-t 1 are stored in association with location 1, page 1, project plan machine identification B (bulldozer) and time 1. Task 11B-t2, design DTM 11B-t2, current DTM 11B-t2 and background files 11-t 2 are stored in association with location 1, page 1, project plan machine identification B (bulldozer) and time 2. Task 11B-t3, design DTM 11B-t3, current DTM 11B-t3 and background files 11-t 3 are stored in association with location 1, page 1, project plan machine identification B (bulldozer) and time 3. Task 11B-t4, design DTM 11B-t4, current DTM 11B-t4 and background files 11-t 4 are stored in association with location 1, page 1, project plan machine identification B (bulldozer) and time 4. There may be more any number of times. Similar associations may be made for other locations 1 through n, pages 1 through n, project plan machine identifications A through Y.

FIG. 6 is a flow chart of a method of the present invention for distributing the selected project data files 12. In a step 100 the project data files 24 are organized for project site locations optionally including pages, elevations and times; and project plan machine identifications. In step 120 the project data distributor receives the machine signal from the construction machine. In a step 140 the project data distributor uses the information in the machine signal for selecting the project data files 12 for the location and/or identification of the machine. Then, in a step 160 the project data distributor transmits the data distribution signal to the machine. At a subsequent time, in a step 180 the project data distributor may receive another machine signal having information for updating the selected project data files 12.

FIG. 7A is a flow chart of the step 100 for organizing the project data files. In a step 102 the files are organized for project site locations. In a step 104 the files are organized for location pages. In a step 106 the files are organized for project plan machine identification. In a step 108 the files are organized for elevations. In a step 110 the files are organized for times. It should be noted that not all the steps 102-110 need be performed and that the steps that are performed may be performed one at a time in any order or may be performed all together at once. The project data files 24 on the database 22 organized as described may be contained on the tangible medium 80 in a form that may be read by a processor.

FIG. 7B is a flow chart of the step 120 for receiving the machine signal. In a step 122 the machine signal information is received for the location of the construction machine. In a step 124 the machine signal information is received for the identification of the construction machine. In a step 126 the machine signal information is received for the elevation of the construction machine. In a step 128 the machine signal information is received for time from the construction machine. It should be noted that not all the steps 122-128 need be performed and that the steps that are performed may be performed one at a time in any order or may be performed all together at once.

FIG. 7C is a flow chart of the step 140 for selecting the project data files. In a step 142 the files are selected for project site locations. In a step 144 the files are paged to location pages. In a step 146 the files are selected for project plan machine identification. In a step 148 the files are selected for elevation. In a step 150 the files are selected for time. It should be noted that not all the steps 142-150 need be performed and that the steps that are performed may be performed one at a time in any order or may be performed all together at once.

FIG. 8 is a flow chart of a method of the present invention for receiving selected project data files 12. The present invention may be embodied on a tangible medium 200 containing a set of instructions for causing a processor to control a machine to carry out the steps of the method. The medium may be a digital memory device such as a digital video device (DVD), compact disk (CD), electronic memory chips, a hard disk, or the like. In a step 202 the construction machine determines its location 45. In a step 204 the machine transmits a machine signal having the location 45. In a step 206 the machine transmits its identification. In a step 208 the machine transmits its elevation. In a step 212 the machine transmits its time. The machine signal may include elevation and/or time. It should be noted that not all the steps 204-212 need be performed and that the steps that are performed may be performed one at a time in any order or may be performed all together at once.

The construction machine receives a distribution signal in a step 214 having the project data files 12 selected for the matching project site location and project plan machine identification in response to the machine signal. In a step 216 the machine determines its precise location or position 46. The machine may be determining its precise location 46 at any time, before or after receiving the distribution signal. Then, in a step 218 the machine or the operator of the machine uses the precise location 46 and the selected project data files 12 for operation.

After operation has begun, in a further step 222 the machine 16 transmits the machine signal for a new local location 45. In a step 224 the machine 16 receives the distribution signal having the selected project data files 12 for a new location page. In a step 226 the machine 16 transmits the machine signal for a current surface in order to update the current digital terrain model at the project data distributor 14. In a step 228 the machine 16 receives the distribution signal having new selected project data files 12 and so on for the operation of the machine 16 on the construction project.

Although the present invention has been described in terms of the presently preferred embodiments, it is to be understood that such disclosure is not to be interpreted as limiting. Various alterations and modifications will no doubt become apparent to those skilled in the art after having read the above disclosure. Accordingly, it is intended that the appended claims be interpreted as covering all alterations and modifications as fall within the true spirit and scope of the invention. 

1. A construction machine, comprising: a transmitter for transmitting a machine signal having information for a geographical location; and a receiver for receiving a distribution signal having a digital terrain model defining a surface for a construction project selected according to said location.
 2. The machine of claim 1, further comprising: an auto-start mechanism for transmitting said machine signal automatically at power-up of said machine.
 3. The machine of claim 1, wherein: said surface is a planned surface for said construction project.
 4. The machine of claim 1, wherein: said surface is a current surface for said construction project.
 5. The machine of claim 1, further comprising: a processor for directing the operation of an implement of the machine according to said digital terrain model.
 6. The machine of claim 5, further comprising: a location device for determining a precise position of the machine; wherein: said distribution signal includes a geographical calibration selected according to said location for converting between a coordinate system used for said precise position and a coordinate system used for said digital terrain model.
 7. The machine of claim 5, wherein: said distribution signal includes an applet selected according to said location; and the processor is configured for being programmed with said applet for using said digital terrain model.
 8. The machine of claim 1, wherein: said distribution signal is received from a project data distributor having a database having a plurality of digital terrain models for a plurality of geographical areas, respectively; and distribution signal includes a particular one of said digital terrain models selected for said construction project where said location is encompassed by a corresponding particular one of said geographical areas.
 9. The machine of claim 8, wherein: the transmitter is constructed for transmitting a new said location when the machine moves; said database further includes a plurality of digital terrain models for a plurality of geographical location page areas, respectively, within said particular geographical area; and said distribution signal includes a new said digital terrain model when said new location is encompassed by a new one of said location page areas.
 10. A method for use in a construction machine, comprising: transmitting a machine signal having information for a geographical location; and receiving a distribution signal having a digital terrain model for defining a surface for a construction project selected according to said location.
 11. The method of claim 10, wherein: transmitting said machine signal includes transmitting said machine signal automatically at power-up of said machine.
 12. The method of claim 10, wherein: said surface is a planned surface for said construction project.
 13. The method of claim 10, wherein: said surface is a current surface for said construction project.
 14. The method of claim 10, further comprising: directing the operation of the machine according to said digital terrain model.
 15. The method of claim 14, further comprising: determining a precise position of the machine; wherein: receiving said distribution signal includes receiving information for a geographical calibration selected according to said location for converting between a coordinate system used for said precise position and a coordinate system used for said digital terrain model.
 16. The method of claim 14, wherein: receiving said distribution signal includes receiving information for an applet selected according to said location; and further comprising: programming the machine with said applet for using said digital terrain model.
 17. The method of claim 10, wherein: receiving said distribution signal includes receiving said distribution signal from a project data distributor having a database having a plurality of digital terrain models for a plurality of geographical areas, respectively; and said distribution signal includes a particular one of said digital terrain models selected for said construction project where said location is encompassed by a corresponding particular one of said geographical areas.
 18. The method of claim 17, further comprising: transmitting a new said location when the machine moves; wherein: said database further includes a plurality of digital terrain models for a plurality of geographical location page areas, respectively, within said particular geographical area; and said distribution signal includes a new said digital terrain model when said new location is encompassed by a new one of said location page areas.
 19. A tangible medium containing a set of instructions for causing a machine to carry out the following steps: transmitting a machine signal having information for a geographical location; and receiving a distribution signal having a digital terrain model for defining a surface for a construction project selected according to said location.
 20. The medium of claim 19, further comprising: directing the operation of the machine according to said digital terrain model. 